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Acid-base indicators

2 PYQ across 2 exams · 2020–2025 — the complete chronological timeline of how UPSC has tested this idea, oldest to newest.

NDA 2020 → GEO 2025
20201 PYQ
NDAQ145
Which one of the following is the correct sequence of change in colours when a turmeric stain on white clothes is scrubbed by soap and then …
20251 PYQ
GEOQ22
Which one among the following is an example of olfactory indicator?…
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